Race condition in Linux kernel - CVE-2026-46223
Published: May 29, 2026
Vulnerability identifier: #VU132979
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-46223
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper synchronization in cgroup rmdir handling when removing a cgroup while zombie reaping and pid namespace teardown are in progress. A local user can trigger cgroup removal in this state to cause a denial of service.
The issue can lead to an A-A deadlock because the reaper can block in an uninterruptible wait while the resources it is waiting on cannot be released.
How to mitigate CVE-2026-46223
Install security update from vendor's repository.